Type-based computation of knowledge graph statistics

Savnik, Iztok (author), Nitta, Kiyoshi (author), Škrekovski, Riste (author), Augsten, Nikolaus (author)

We propose a formal model of a knowledge graph (abbr. KG) that classifies the ground triples into sets that correspond to the triple types. The triple types are partially ordered by the sub-type relation. Consequently, the sets of ground triples that are the interpretations of triple types are partially ordered by the subsumption relation. The types of triple patterns restrict the sets of ground triples, which need to be addressed in the evaluation of triple patterns, to the interpretation of the types of triple patterns. Therefore, a schema graph of a KG should include all triple types that are likely to be determined as the types of triple patterns. The stored schema graph consists of the selected triple types that are stored in a KG and the complete schema graph includes all valid triple types of KG. We propose choosing the schema graph, which consists of the triple types from a strip around the stored schema graph, i.e., the triple types from the stored schema graph and some adjacent levels of triple types with respect to the sub-type relation. Given a selected schema graph, the statistics are updated for each ground triple t from a KG. First, we determine the set of triple types stt from the schema graph that are affected by adding a triple t to an RDF store. Finally, the statistics of triple types from the set stt are updated.

• Language: English
• Keywords: knowledge graphs, RDF stores, graph database systems, graph databases, database statistics
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FMF - Faculty of Mathematics and Physics
• Publication status: Published
• Publication version: Version of Record
• Year: 2025
• Number of pages: Str. 787-815
• Numbering: Vol. 93, iss. 5
• PID: 20.500.12556/RUL-178129
• UDC: 004.65
• ISSN on article: 1012-2443
• DOI: 10.1007/s10472-024-09965-3
• COBISS.SI-ID: 223651843
• Publication date in RUL: 19.01.2026

Record is a part of a journal

• Title: Annals of mathematics and artificial intelligence
• Shortened title: Ann. math. artif. intell.
• Publisher: Springer Nature
• ISSN: 1012-2443
• COBISS.SI-ID: 43126017

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: grafi znanja, RDF zbirke podatkov, grafovske podatkovne baze

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P1-0383
• Name: Kompleksna omrežja

• Funder: Federal State of Salzburg
• Project number: 20102-F2101143-FPR
• Name: Digital Neuroscience Initiative